Manuscript Summary: This manuscript, dated in two places to the years 1465 (p. 393) and 1467 (p. 181) and perhaps written by eight different hands, belonged to the Benedictine Convent of St. George near St. Gall and became part of the Abbey Library of St. Gall as part of an exchange around 1780/82. The codex, written entirely in German, contains the explanation of the Decalogue by Marquard of Lindau (pp. 3−176); the song Ain raine maid verborgen lag from Spiegelweise by Heinrich Frauenlob (pp. 177−181); instructions regarding attention during prayer, attributed to Thomas Aquinas (pp. 182−186); the Büchlein der ewigen Weisheit by Henry Suso (pp. 195−393); reflections on consecration (pp. 394−399) and on the Sunday (pp. 399−402); as well an anonymous treatise on death (pp. 405−422). Several parchment fragments from an 11th/12th century St. Gall liturgical manuscript containing neumes were used in order to reinforce this manuscript. (smu)